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Unconfirmed Reports Claim KOSPI Plunged 8.5% and Halted Trading; Samsung and SK Hynix Shares Reportedly Fell Sharply

November 5, 2026 at 19:59 EST

Finance
Manufacturing

Unconfirmed reports claim South Korea's benchmark KOSPI index fell 8.5% within three minutes of the market opening and that trading was halted, with memory chipmakers Samsung Electronics and SK Hynix reportedly dropping 11% and 12%, respectively. These claims have not been confirmed by the Korea Exchange or any official source in the material reviewed for this report.

Unverified market reports · South Korea

Reported KOSPI sell-off and memory chip plunge remain unconfirmed

Reports say the KOSPI fell 8.5% within three minutes of the open and trading was halted, with Samsung Electronics and SK Hynix down 11% and 12%. No confirmation from the Korea Exchange or the companies has been found.

8.5%

Reported KOSPI decline

11%

Reported Samsung Electronics drop

12%

Reported SK Hynix drop

3 min

Reported time from open to the KOSPI move

Reported declines, drawn to scale

Each block equals 1 percentage point of reported decline. Unverified figures.

8.5%

KOSPI

11%

Samsung Electronics

12%

SK Hynix

The two memory chipmakers are reported to have fallen further than the index, which matters because both are leading suppliers of memory used in data centers and AI hardware.

How the reported event would unfold

1. Sell-off at open

KOSPI reportedly down 8.5% in three minutes

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